Improvement in hot-blast ovens



5 Sheets-Sheet 1 v W. A. MILES su J.H. BURGHARDT. f Hop- Blast Oven. No. 208,915. Patented!l Oct. 15. 1878.

y 5 sneeuw-sluwe'. 2. W. A. MILES 8v J. H. BURGHARDT.

Hot-Blast Oven. No. 208,915. Patented Oct..15, 1878.

ILPTERS. PHOTO-LITHUGRAPHEH, WASHINGTON. D. KJ4

' 5 Sheets-Sheet 3. W. A. MILES & J. I-I. BURGHARDT. Hot-Blast Oven. No. 208,915. Patented 06h15, 1878'.

5 Sheets-Sheet. 4. W. A. MILES 8v J. H. BURGHARDT.

Hot-Blast Oven.

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` sheets-Sheet 5. W. A. MILES 8v J. H. lBURGr-EIARDT.

Hot-Blast Oven.

lNo. 208,915; Patented Oct. I5, 1878.

N. PETERS, PHOTO L\THoaRAPH UNITED STATES PATENT OFFICE.

VILLIAM A. MILES, OF OOPAKE IRON WORKS, NEW YORK, AND JOHN Il. BURGHARDT, OF OURTISVILLE, MASSACHUSETTS.

`IMPROVEMENT IN HOT-BLAST OVENS- Specilication fomning part of Letters Patent N0. 208,915, dated October l5, 1878,' application filed February 20, 1877.

To all 'whom t may concern:

Be it known that We, WILLIAM A. MILES, of Oopake Iron Works, in the county of Columbia and State of New York, and JOHN H. BURGHARDT, of Ourtisville, in the county ot Berkshire and State of Massachusetts, have invented a new and VImproved HotfBlast Oven for Furnaces 5 and we do hereby declare th at the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This invention relates to that class of hotblast ovens in which the air-pipe is suspended from above; and it consists, mainly, in certain details of construction which will be fully described hereinafter.

In the drawings, Figure l represents aside elevation of our invention, partially broken away to show the interior; Fig. 2, a sectional elevation of the same, taken on line xx, Fig. 9 Fig. 3, a sectional elevation taken online yy, Fig. 9; Fig. 4., a transverse vertical sectional elevation; Fig. 5, a partial transverse horizontal section on line z z, Fig. 4; Fig. 6, a vertical sectional elevation, showing a modified form of flue; Figs. 7, 8,10, and 1]., detail views of various parts, and Fig. 9 a plan view ofthe oven with top removed.

To enable others skilled in the art to make and use our invention, we will now proceed to describe fully its construction and manner of operation.

Arepresents the brick-work of the oven, constructed generally of any proper size and suitable proportions. a represents the combustion-chamber, located in the base of the oven, into which are discharged, in any suitable manner, the waste flame and gas from the furnace-top.

al a2 a3, Figs. 2, 6, and 9, represent flues Vformed by the outside walls, a4 a5, and the intermediate division-walls, a6 a", into which the ilame or gas is discharged from the combustion-chamber, as shown.

a a9, Fig. 2, represent proper openings in the division-walls, by means of which the gas is permitted to pass onward to the dischargeopening al leading into the chimney.

If desired, instead ofthe opening a9, an open- 'devices d3 d4, or other proper means.

ing, may be employed, as shown in dotted lines, Figs. 2 and 6, in which case the circulation of the gas, of course, will be correspondingly changed.A

a a represent dampers adapted for adjustment by any proper means, for the purpose of controlling the flow of gas into the fines al, a2, and a3. These filles, it will be observed, are provided below with long narrow openings, through which the gas enters, thev extent of the opening, of course, being determined by the position of the dampers.

B represents a bed-pipe located at one end ofthe oven at or near the top ofthe same. which is provided at proper points with the branch discharge-pipes b-b, as shown.

C represents the air-pipe through which the air-blast from pipe B is conveyed. This consists of a series of independent sections united to form a continuous pipe by proper coupling devices, hereinafter'described.

c, Fig. l1, represents an individual section, consisting of a Ushaped pipe or tube having right-angled arms c1, as shown, and an intervening web, c2, preferably'cast in one piece with the leg, by means of which the latter are rigidly united together. c3 represents an opening in the web near its top, which is adapted to receive a hook or other device for lifting it into or out of position.

D, Figs. l, 2, and 8, represents a coupling or packing sleeve adapted to unite two sections together, or the end section of the series to one of the branches of the bed-pipes. This consists of a base-piece, d, adapted to rest upon the iron plate d2, which covers the division and outside walls, and a removable cap-piece, di, which is properly secured to the base-piece, when the pipes are in place, by the fastening These coupling-sleeves are packed with iron borings or other suitable material, in the usual wellknown or other proper manner.

E represents a bed-pipe, into which the hotair blast from the airpipes is discharged through proper branches, e c, and from which it is conveyed to the tuyeres.

The air-pipe, it will be observed, is located at right angles to the longitudinal center line of the flue-chambers, so that each otA its sides is equally exposed to the action of the and By means of the increased heating-surface,

flame. A modified form of pipe and coupling is shown in Figs. 4, 7, 9, and 10, and will now be described.

F, Figs. 7 and 10, represents an individual section of the pipe having the U-shaped form and intervening web` hereinbefore` described; but which is provided at its upper end with the socket-enlargement f and the supportinglugs f1, as shown. G represents a double elbow, the ends of which are adapted to rest in the socketbearings and imite the sections together, as shown.

'Ihe operation of my improved oven will be readily understood. The gas and ame from the furnace-top are passed through the combustion-chamber into the lues in which the sections of the air-pipe are suspended, and thence through the discharge-openings to the chimney-stack. The air is forced through the continuous pipe to the tuyeres, being highly heated, of course, in its passage,

Some of the advantages of the described construction are as follows:

The pipes may be readily removed when worn out, and new ones be inserted without interfering with the work of the furnace.

The pipes also, being more uniformly heated, will last for a greater length of time.

A larger number of pipes can be placed in a given space owing to the compact arrangement, and the heating-surface be correspondingly increased.

and the more perfect exposure of the pipes to the action of the gas and flame, a higher teniperature may be obtained.

We are aware that sleeves or collars have been before used for the purpose of connecting hot-blast-oven pipes.

We are also aware that the independent pipe-sections have been supported on the dividing-walls of said ovens; but,

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In combination with the packing-sleeve D, supported by the walls a4 a5 a, the independent sectional pipes C, whereby any member of the series can be removed from the top ofthe furnace without disturbing the remaining members.

2. In combination with a series of U-shaped oven-pipes having an intermediate web provided with an opening, as described, a packing-sleeve, D, substantially as set forth.

This specification signed and witnessed this 30th day of December, 1876.

VVILLIAIWI A. MILES. JOHN H. BURGHARDT.

'Witnessesz M. WARNER, IT. J. DUNHAM. 

